The condition is increasing in incidence, in part as the result of women postponing pregnancy until they're older and less likely to conceive. There are other possible causes, but unexplained infertility still accounts for up to 10% of all cases. Artificial insemination is often used to treat unexplained infertility.
Bald eagles are a North American species that historically occurred throughout the contiguous United States and Alaska. The largest North American breeding populations are in Alaska and Canada, but there are also significant bald eagle populations in the Great Lakes states, Florida, the Pacific Northwest, the Greater Yellowstone area, and the Chesapeake Bay region. Adult bald eagles have the dark brown body and distinctive white head and tail. In contrast, juvenile bald eagles have mottled brown and white plumage.
Eagles are large birds of prey which are members of the bird family Accipitridae and belong to several genera which are not necessarily closely related to each other.Most of the more than 60 species occur in Eurasia and Africa.Outside this area, just two species can be found in the United States and Canada, nine more in Central and South America, and three in Australia.ost of the more than 60 species occur in Eurasia and Africa. Outside this area, just two species can be found in the United States and Canada, nine more in Central and South America, and three in Australia.